Hot briquetting roller press



- De 7, 1955 H. SCHNIER' 3,221,368

HOT BRIQUET'IING ROLLER PRESS I 3 Sheets-Sheet 1 Filed March 23, 1964Jnrenfan- HEINRICH SCHNIER BY D/ M914 fl L Dec. 7, 1965 s 3,221,368

HOT BRIQUETTING ROLLER PRESS Filed March 23, 1964 3 Sheets-Sheet 2 43Jnrenfor:

HEINRICH SCHNIER BY s f 4 Dec. 7, 1965 H. SCHNIER HOT BRIQUET'I'INGROLLER PRESS 3 Sheets-Sheet 3 Filed March 23, 1964 Jnren/on- HEINRICHSCH NIER Dec. 7, 1965 H. SCHNIER 3,221,358

HOT BRIQUETTING ROLLER PRESS 3 Sheets-Sheet 5 Filed March 23, 1964Jnren/an- HEl NRICH SCH NIER United States Patent 3,221,368 HOTBRIQUETTING ROLLER PRESS Heinrich Schnier, Hattingen (Ruhr), Germany,assignor to Maschinenfabrik Koppern & C0. Kommanditgesellschaft,Hattingen (Ruhr), Germany Filed Mar. 23, 1964, Ser. No. 354,058 Claimspriority, application Germany, July 8, 1960, M 45,871 6 Claims. (Cl.18-9) This invention relates to improvements in briquetting presses, andthis application is a continuation-impart of my application Serial No.122,534, filed July 7, 1961, now abandoned.

Briquetting presses of the type here involved comprises a frame providedat both sides with longitudinally extending openings for receivingbearing blocks for the cooperating press rolls, whereby one of saidblocks is slidably mounted and supported by hydraulic means against thewall adjoining the opening. The openings are strengthened by surroundingflange-like bands, and the frame itself is divided along the center ofthe axes of the press rolls.

A principal object of the invention is to provide such a press framewhich is suitable for hot briquetting.

Another object of the invention is to provide means for enclosing theprotecting gas atmosphere in a smooth and easily cleaned space.

Other objects and advantages will be apparent from a consideration ofthe specification and claims.

In using presses. of the character described for hot briquetting, aparticular problem arises by the need to seal the longitudinallyextending openings in such a manner that on the one hand, the passagesof the shafts of the briquetting rolls are sealed while, on the otherhand, the movable bearings can be displaced in the plane laid throughthe axes of said rolls.

In the accompanying drawings which illustrate two embodiments of myinvention in a diagrammatic manner,

FIG. 1 is a schematic view in side elevation of a press frame accordingto the invention, a portion of the frame being broken away;

FIG. 2 is a sectional view taken along line IIH of FIG. 1;

FIG. 3 is a cross section taken along line III-III of FIG. 2;

FIG. 4 shows on an enlarged scale, a detailed sectional view of theframe in the area of a bearing, and

FIG. 5 is a vertical sectional view, taken through the shaft of a pressroll, showing another embodiment of a press frame in accordance with theinvention.

As will be seen from FIGS. 1 and 2, the briquetting machine of theinvention comprises the two rolls 1, 2 rotating in opposite directions,which rolls are equipped on their surfaces with bands providing thedesired molds. The rolls 1, 2 are journaled in the frame 4 of the pressin bearings 5, 6; bearing 6 is displaceable and bears against ahydraulic adjustment and safety device 7. Between the two bearings,there is provided a spacer bar 8 which defines the smallest spacing ofthe shafts of the rolls. A hopper 9 is provided on a cover closing theupper part of the press frame 4.

The sides of the frame 4 are double-walled. The space formed betweenwalls 11 and 12 serves as a cooler equipped with inlets 13 and outlets14 for the cooling liquid.

The frame is provided with a longitudinal rectangular opening or slot 15surrounded by a flange-like band 16; bearing blocks 17, 18, whichsupport the bearings 5, 6 are mounted in said slot, as well as thespacer bar 8 and a hydraulic adjustment device which comprises twoadjusting plungers 19 and 20 which abut against the bearing block 17above and below the shafts of the rolls, re-

3,221,368 Patented Dec. 7, 1965 spectively. The frame is divided in theplane of the axes of the shafts. Ajoining the division plane, the twosections of the frame are provided with flange-like bands 22, 23 whichare bolted or screwed together.

The two openings or slots 15 are closed at the inside of the frame bymeans of plates 24 which are hermetically joined to the inner edge ofthe band 16, preferably by welding. As will be noted from FIG. 3, saidplates are also divided in the division plane of the frame 21 andprovided adjacent their division plane 25 at one side or at both sideswith flanges through which they are joined by means of bolts and screwslike the two sections of the frame. Said plates have openings 26 forpassage of the shafts, the sealing of which will be described in detailhereafter.

On a section of shaft 27, a roller bearing 29 is secured by means of acone key 28 and outwardly enclosed by a housing 18 (FIG. 4). By means oflateral covers 30, 31, a fluidtight seal of the bearing is obtained. Thecovers 30, 31 seal against the shaft by means of packings 32, 33. A bore34 extends in axial direction through the housing 18; the outside end ofsaid bore is equipped with a connection 35 while the opposite end openstowards the inner front side of the roller bearing. A radial bore 36leads from the bore 34 to the center area of the bearing 29. A furtherfitting 37 is provided on the outer cover 27 (FIGS. 1 and 2).

The described construction provides for a circulating oil lubricationfor the bearing which achieves at the same time a liquid cooling of thebearing. Hereby, the oil is introduced through a conduit connected toconnection 35. Part of the oil enters radially into the bearing throughbore 36 while the remaining oil leaves at the opposite end of the bore34, passes along the inner surface of the cover 30 and flows thenthrough the roller bearing from the inside in axial direction. Afterleaving the bearing 29, the oil passes through the connection 37 (FIG.2) into a return conduit.

The bearing has to be lined so as to have the normal clearance when theshaft 27 is hot. The packings 33 in the inner cover 30 are preferablyformed as gland packings. The reference numeral 38 designates thestuffing box gland.

The stuffing box prevents the leakage of oil which serves forlubrication and cooling of the bearings, as well as the leakage ofprotecting gas from the inside of the closed press housing. Inside thehousing a protective gas atmosphere must be maintained to prevent at thehigh temperatures obtaining in the press ignition or oxidation of thematerial to be briquetted.

The inner bearing covers 30 are provided with axial annular projections39 extending in direction of the press rolls; said projections form withtheir inner sides the stuffing box housing and carry at their outersides a sealing support 40. Said sealing support comprises an annularchannel in which a U-shaped packing 41 is inserted which consists of ahigh temperature resistant material retaining good lubricatingproperties even at elevated temperatures.

The packings 41 straddle the plate 24 and seal the same against thebearing housings. In the area of the seal, the plate 24 is not flanged.In the area of the displaceable bearing block, the opening 26 in theplate 24 can either be longitudinally extended in the direction of thedisplacement, or it can be made with a certain radial excess to allow ofthe displacements of the bearing block during operation of the press.

The sealing arrangement set forth hereinabove makes it possible to carryout the horizontal displacement of the bearing block, which is necessaryfor operative and thermic reasons, while maintaining the seal of theinterior of the press against the outer atmosphere.

In the embodiment of the invention shown in FIG. 5, the press frame 4itself is not a part of the enclosure for the inert gas atmosphere.Rather, I provide inside the press inwardly of the press frame a closedhousing 42. Said housing 42 may,- like the plates 24 of the modificationdescribed above, consist of relatively thin Walled sheets and issupported in the frame by crossbars 43, 44. It is also divided in theplane passing through the two shafts of the press and provided withflanges for their assemblage. Openings 45 are provided for passage ofthe shafts. Said passages may be sealed as set forth with respect toFIG. 4. In the embodiment of FIG. 5, the axial projections 46 of theinner bearing covers are provided with an annular flange 48 whichprojects at the outside of the housing 42 over the opening 45. At theinside of the housing, there is .a disc 49 which bears with an axialprojection 50 against the flange 48 and is joined thereto by bolts andscrews 51. Coil springs at the outside of the flanges 48 tighten theassemblage.

A U-shaped packing 52, similar to the packing 41, is placed between theflange 48 and the disc 49.

At the inside of the flange 48, a channel 53 for a cooling fluiddecreases the heat stresses to which the bearing is subjected.

Compared with the embodiment of the invention illustrated in FIGS. 1-4,the modification of FIG. 5 has the advantage of presenting for the inertgas atmosphere a housing which has a smooth inside, whereby the enclosedspace is small. In addition, this modification allows of using stainlessheat resistant steel for the walls of the housing 42. If such steelswould be used for the parts of the frame of FIGS. 1-4 which are subjectto the com pression forces, the construction would become much moreexpensive.

In the construction of FIG. 5, the annular channel receiving the packingis formed of two parts which are pressed against each other by the forceof spring 51, ensuring an even axial pressure on the packing at alltimes. The part 48 of the bearing cover is equipped with a channel 53for cooling water to protect the bearings against heat. The innerbearing cover 30 of the modification of FIG. 3 could be similarlydesigned.

The feed system 9 is a constructive unit and forms the upper cover forthat part of the press housing in which a protective gas atmosphere mustbe maintained.

The roller press is suitable for the hot briquetting of coal and otherparticulate materials.

I claim:

1. A roller briquetting press for the hot briquetting of coal andsimilar materials by means of rolls which are rotatable in a closedhousing in mutually opposite direc tions about parallel shafts which aredisplaceable with respect to each other in their common plane, saidpress comprising, in combination a double walled frame consisting of twosectionsjoined in said common plane, longitudinally extendingcorresponding openings in opposite sides of said frame, strengtheningflanges passing around said openings, bearing blocks for said shaftslocated inside said openings, one of said bearing blocks beingdisplaceable, hydraulic means supporting said displaceable bearingagainst a wall forming said opening, bearing covers firmly secured tosaid bearing blocks and covering the bearings at their sides facing saidrolls, projections at said covers extending in the direction of saidrolls, a stuffing box between said projection and the shaft supported bysaid bearing, a plate tightly joined to said flange and extending insidethe frame over said entire opening, said plate consisting of twosections joined in said common plane, apertures in said plate forpassage of the shafts and said projections, the apertures for the shaftsupported by the displaceable bearing being shaped to permit suchdisplacement, annular channeled packing supports secured to said bearingcovers, and U-shaped packings in said supports straddling said plates.

2. A press as claimed in claim 1 wherein said apertures for thedisplaceable shaft have a longitudinally extended shape.

3. A press as claimed in claim 1 wherein said apertures for thedisplaceable shaft have a larger diameter than the diameter of thebottom of the U-shaped packing.

4. A roller briquetting press for the hot briquetting of coal andsimilar materials by means of rolls which are rotatable in a closedhousing in mutually opposite directions about parallel shafts Which aredisplaceable with respect to each other in their common plane, saidpress comprising, in combination, a double walled frame consisting oftwo sections joined in said common plane, longitudinally extendingcorresponding openings in opposite sides of said frame, strengtheningflanges passing around said openings, bearing blocks for said shaftslocated inside said openings, one of said bearing blocks beingdisplaceable, hydraulic means supporting said displaceable bearingagainst a wall forming said opening, bearing covers firmly secured tosaid bearing blocks and covering the bearings at their sides facing saidrolls, projections at said covers extending in the direction of saidrolls, a stuffing box between said projection and the shaft supported bysaid bearing, a casing inside said frame, said casing consisting of twosections joined in the same plane as the sections of said frame, thewalls of said casing being located between the walls of said frame andsaid rolls, apertures in said casing for passage of the shafts and saidprojections, the apertures for the shaft supported by the displaceablebearing being shaped to permit such displacement, annular channeledpacking supports secured to said bearing covers, and U-shaped packingsin said supports straddling the walls of said casing.

5. A press as claimed in claim 4 wherein said apertures for thedisplaceable shaft have a longitudinally extended shape.

6. A press as claimed in claim 4 wherein said apertures for thedisplaceable shaft have a larger diameter than the diameter of thebottom of the U-shaped packing.

References Cited by the Examiner UNITED STATES PATENTS 2,485,128 10/1949 Adams. 2,717,419 9/1955 Dickey 189 XR 2,843,879 7/1958 Komarek etal M 1821 3,114,930 12/1963 Oldham et a1 18-9 XR WILLIAM J. STEPHENSON,Primary Examiner.

1. A ROLLER BRIQUETTING PRESS FOR THE HOT BRIQUETTING OF COAL ANDSIMILAR MATERIALS BY MEANS OF ROLLS WHICH ARE ROTATABLE IN A CLOSEDHOUSING IN MUTUALLY OPPOSITE DIRECTIONS ABOUT PARALLEL SHAFTS WHICH AREDISPLACEABLE WITH RESPECT TO EACH OTHER IN THEIR COMMON PLANE, SAIDPRESS COMPRISING, IN COMBINATION A DOUBLE WALLED FRAME CONSISTING OF TWOSECTIONS JOINED IN SAID COMMON PLANE, LONGITUDINALLY EXTENDINGCORRESPONDING OPENINGS IN OPPOSITE SIDES OF SAID FRAME, STRENGTHENINGFLANGES PASSING AROUND SAID OPENINGS, BEARING BLOCKS FOR SAID SHAFTSLOCATED INSIDE SAID OPENINGS, ONE OF SAID BEARING BLOCKS BEINGDISBEARING AGAINST A WALL FORMING SAID OPENING, BEARING COVERS FIRMLYSECURED TO SAID BEARING BLOCKS AND COVER-